S
M
T
W
T
F
S
29
49°
36°
30
52°
38°
1
54°
37°
2
52°
38°
3
54°
36°
4
52°
35°
5
51°
35°
6
50°
36°
7
52°
35°
8
46°
32°
9
42°
32°
10
43°
31°
11
43°
33°
12
44°
30°
13
43°
27°
14
45°
21°
15
38°
22°
16
36°
27°
17
39°
26°
18
38°
31°
19
46°
30°
20
48°
27°
21
43°
24°
22
39°
23°
23
37°
22°
24
39°
29°
25
41°
22°
26
47°
19°
27
36°
20°
28
33°
20°
29
37°
19°
30
36°
24°
31
37°
29°
1
49°
23°
2
47°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Dedham
Dedham's December 2026 forecast shows daily high temperatures ranging from 33° to 54°, with overnight lows between 18° and 38°. The average high for December is 44° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Dedham. See also: January | February | March.
